There is a pretty cool article in today's NYT about the border of Yankees fandom and Red Sox Nation. X, you're safe. You were raised in pretty solid RSN territory, although they say Hartford is only 2/3 RSN. There is also a pretty good video clip of the journalist doing his research for the story. It's mostly ancedotel but still pretty interesting., albeit cheesy at times.
I have a feeling if someone did a more detailed study they would find large pockets of both Yankee and Red Sox fans behind enemy lines. I had always heard that New London is a heavy Yankees town which steams back to the days that the Yankees would stop there for the night on the train rides to and from Boston. Also from my days of working in Rhode Island I seem to remember odd pockets of Yankee fans there as well. I think that had more to do with Providence being in Boston's shadow then anything else, as I recall.
Anyway, let the war begin!
So who's going to be bigger our Johnson or their Wang? (Couldn't resist).